If you have ever peeled back a silicone mould only to hear that sickening little rip at the edge, you already know the frustration. One torn mould can ruin a batch of pendants, delay a wedding favour order, or cost you a piece you spent three hours pouring. And yet most crafters blame the resin — when the real culprit is almost always the demoulding process itself.
Silicone mould tearing in resin work is one of the most common problems Indian crafters face, especially when order volumes pick up around wedding season. The combination of rushing, skipping mould release, and using the wrong tools turns even a good-quality mould into a shredded mess within five or six uses.
This guide breaks down exactly why silicone moulds tear at the edges, which demoulding tools actually help, and how to build a simple care routine that keeps your moulds alive through hundreds of pours — so you are ready when the shaadi season order list starts getting long.
Quick Answer
Here is the short version if you are in a hurry:
- Silicone mould tearing in resin work is almost always caused by force — pulling too hard, too fast, or at the wrong angle.
- Mould release spray applied before every pour dramatically reduces adhesion between cured resin and the mould walls.
- Soft spatulas, wooden sticks, and a gentle flex-and-peel technique protect mould edges better than fingers alone.
- Fully cured resin (not just surface-dry) releases far more cleanly — rushing by even a few hours causes tearing.
- Thin-walled moulds and fine-detail edge designs are highest risk and need the most care.
Why Silicone Moulds Tear at the Edges
Silicone is flexible, yes — but it is not indestructible. The edges and thin walls of a mould are the weakest points, and tearing almost always starts there.
The resin was not fully cured
This is the number-one reason. When resin is only surface-dry but still slightly soft inside, it grips the mould walls with much more force than fully cured resin. You pull, the mould stretches, and the edge gives way. Epoxy resin typically needs 24–48 hours at room temperature before demoulding — and in cooler Indian winters or air-conditioned rooms, it can take longer. Check our guide on Why Your Resin Is Still Sticky After 24 Hours — and How to Fix It Before You Ruin the Piece if you are seeing tackiness even after a full day.
No mould release was used
Resin is naturally adhesive. Without a barrier between the cured resin and the silicone, the two surfaces bond — not chemically, but mechanically. Every tiny texture detail in the mould becomes a grip point. Mould release spray creates a thin film that breaks that grip cleanly.
Pulling straight up instead of peeling
Straight upward force concentrates all the stress at one point — usually the thinnest part of the edge. Peeling distributes that stress progressively, the same way you peel a sticker rather than yanking it off.
Overfilling the mould
When resin overflows slightly and cures around the rim, it locks the mould edge in place. Trying to flex the mould with that locked rim tears it almost immediately.
Using sharp or metal tools near the edge
Metal spatulas, craft knives, and even fingernails can nick silicone. Once there is a small cut at the edge, every subsequent demould extends it a little further until the mould splits completely.
How Mould Release Spray Actually Works
A mould release spray is a thin lubricating barrier — usually silicone-based or wax-based — that coats the inside of the mould before you pour resin. It does not prevent the resin from curing; it just makes the cured surface slip away from the mould walls instead of gripping them.
For resin art, the Mould Releaser (30ml) from Shrebhavi is a practical option for Indian crafters — the 30ml size is enough for dozens of pours and easy to keep at your workstation without taking up space.
How to apply mould release correctly
- Hold the can 20–25 cm from the mould surface.
- Spray a light, even coat — do not flood it. A thin mist is enough.
- Let it sit for 30–60 seconds before pouring resin.
- If you are doing intricate detail moulds (like jewellery), use a soft brush to spread the release into deep corners after spraying.
- Reapply before every single pour, even if the mould looks fine.
Safety note: Use mould release in a ventilated area. Spray away from your face and avoid inhaling the mist. If you are working indoors, open a window or use a small fan to move air away from your workspace.
One common mistake is applying too much release — thick coats can leave a slightly cloudy surface on your finished resin piece. Less is more here.
Demoulding Tools Every Indian Crafter Should Own
Your fingers alone are not enough — and they are often the reason moulds tear. The right demoulding tools for resin art make the process safer for both the mould and the finished piece.
| Tool | Use | Risk if skipped |
|---|---|---|
| Soft silicone spatula | Gently prying edges away from mould walls | Fingers apply uneven force; mould tears |
| Wooden craft stick | Pushing resin away from stubborn corners | Metal tools nick silicone edges |
| Mould release spray | Reducing adhesion before every pour | Resin grips mould; tearing on demould |
| Heat gun or blow torch (brief, low heat) | Very slightly warming mould base to loosen grip | Cold resin in a cold mould is stickier |
| Thin plastic card (old loyalty card) | Sliding between resin edge and mould rim | Fingers cannot get into thin gaps cleanly |
The Resin Essential Set 1 from Shrebhavi includes several mixing and application tools that also work well during demoulding — especially the soft mixing sticks that will not scratch silicone.
If you use a blow torch for bubble removal during pouring (which is standard practice), the same Blow Torch can be used very briefly on the underside of a mould to warm it slightly before demoulding — just two or three seconds from a distance of about 10 cm. Do not hold it in one spot. This gentle warmth softens the silicone just enough to release grip without deforming the resin piece.
Safety note for blow torch use: Never apply heat directly to the resin surface. Only warm the underside or exterior of the mould. Keep your workspace clear of flammable materials and never leave a lit torch unattended.
Step-by-Step Demoulding Technique
Good technique matters more than any single tool. Here is a reliable method that protects both the mould and the finished piece.
Step 1 — Confirm full cure
Press gently on the back of the mould. The resin should feel completely hard with no give. If there is any flex or tackiness, wait another 4–6 hours. Rushing this step is responsible for more torn moulds than any other mistake.
Step 2 — Flex the mould gently
Hold the mould with both hands and gently bend the sides inward, then outward. Do this slowly — you are breaking the suction seal between the resin and the mould walls, not trying to pop the piece out.
Step 3 — Work the edges first
Use a soft silicone spatula or a wooden craft stick to very gently press the mould edge away from the resin all the way around the perimeter. Think of it like loosening a cake from a tin before turning it out.
Step 4 — Peel, do not pull
Start at one corner and peel the mould back slowly, like peeling a banana. Keep the angle low — peel the mould back on itself rather than pulling it straight away from the resin. This distributes stress evenly and keeps the thin edges intact.
Step 5 — Support the resin piece as it releases
Have your other hand ready to catch or support the resin piece as it comes free. Dropping a freshly demoulded piece can chip edges or crack thin sections.
Keeping Moulds Alive Through Bulk Wedding Season Orders
Wedding season in India — running roughly from October through February with peaks around auspicious dates — means crafters often need to pour the same mould ten, fifteen, or twenty times in a short window. That kind of repeated use is where silicone mould tearing in resin work becomes a real business problem.
A few habits that make a significant difference during high-volume periods:
- Rotate between multiple moulds. If you have three identical pendant moulds, use all three in rotation rather than hammering one mould with back-to-back pours. Silicone needs a little recovery time between uses.
- Never skip mould release, even on the tenth pour. The release layer gets thinner with each use — reapply every single time.
- Clean moulds gently between pours. Use a soft cloth or a little warm water. No solvents, no scrubbing.
- Let resin cure for the full recommended time even when you are in a rush. A torn mould mid-season costs you far more time than waiting an extra few hours.
For jewellery and pendant work specifically, the Jewellery & Pendant Mould (Set Of 4) gives you four moulds to rotate — which is exactly the kind of setup that protects individual moulds during heavy order periods. Similarly, if you are making trays or handles as part of wedding gift sets, the Tray Handle Mould has a straightforward shape that responds well to the flex-and-peel technique described above.
Also worth reading before wedding season gets going: UV Resin vs Epoxy Resin for Small Moulds: Which One Actually Works Better for Keychains, Pendants, and Jewelry in Indian Humidity? — because the resin type you choose also affects how easily pieces release from the mould.
Which Mould Shapes Are Most Prone to Tearing
Not all moulds carry the same risk. Understanding which shapes need extra care helps you prioritise your technique.
High risk: thin-walled and fine-detail moulds
Jewellery moulds with intricate borders, lace patterns, or very thin walls are the most vulnerable. The silicone between fine details is thin enough that even moderate force tears it. Always use mould release and peel very slowly with these.
Medium risk: deep cavity moulds
Coaster and tray moulds with deep sides create suction as the resin cures. The flex-and-peel method is especially important here — break the suction seal at the edges before attempting to remove the piece.
Lower risk: shallow, wide moulds
Flat moulds with gentle curves and no undercuts are the most forgiving. Even so, skipping mould release will eventually cause tearing at the rim.
If you are new to resin casting and choosing your first moulds, it is worth understanding mix ratios and cure times before you begin — see How to Choose the Right Resin Ratio for Your First Project: 1:1 vs 2:1 Explained for Indian Beginners for a clear starting point.
Silicone Mould Care and Storage Tips
Good demoulding technique extends mould life significantly, but storage and cleaning habits matter just as much.
- Store flat or in their original shape. Folding or stacking moulds under heavy objects deforms the silicone permanently. Flat storage on a shelf is ideal.
- Keep away from direct sunlight. UV exposure degrades silicone over time, making it brittle and more prone to tearing.
- Clean with warm water only. Avoid acetone, alcohol, or any solvent near silicone moulds — they break down the material.
- Inspect edges before every pour. A tiny nick caught early can be worked around; the same nick ignored for five more pours becomes a split.
- Do not stretch the mould unnecessarily. Over-flexing during demoulding weakens the silicone even if it does not tear immediately.
For crafters working through the monsoon season or in high-humidity environments, the Creating Unique Monsoon Decor: A Step-by-Step Guide to Using Silicone Molds with Resin guide has some useful notes on how humidity affects both resin curing and mould behaviour.
And if you are pouring in summer months — particularly May and June — be aware that heat accelerates epoxy cure, which can cause exothermic reactions in deep moulds. Read Deep Pour vs Thin Pour Epoxy in Indian Summers: Why Your Resin Overheats in May and What to Do About It before you start a large pour in warm weather.
Frequently Asked Questions
Why does my silicone mould tear at the edges even when I am being careful?
The most likely cause is that the resin was not fully cured before demoulding. Even if the surface feels hard, the interior may still be slightly soft, which increases grip on the mould walls. Wait the full cure time recommended by your resin manufacturer — usually 24–48 hours for epoxy — and always use mould release spray before pouring. If you are already doing both of those things, check whether you are pulling straight up rather than peeling the mould back at a low angle.
How many times can I use a silicone mould before it tears?
A well-maintained silicone mould used with proper release spray and gentle demoulding technique can last 50–100+ pours easily. Moulds that are used without release spray, demoulded too early, or handled with metal tools may tear within 5–10 uses. The care routine matters far more than the number of pours.
Can I repair a torn silicone mould?
Small tears at the edge can sometimes be stabilised with a dab of silicone sealant (the same type used for bathroom sealing), but the repaired area will always be a weak point. For jewellery moulds where detail matters, a repaired tear usually affects the finish of the resin piece too. It is generally better to retire a torn mould and replace it rather than risk ruining finished pieces.
Is mould release spray safe to use indoors?
Most mould release sprays are aerosol-based and should be used in a well-ventilated area. Spray away from your face, avoid breathing the mist, and let the solvent carrier evaporate for 30–60 seconds before pouring resin. If you are in a small room, open windows or use a fan to direct fumes away from you. The Mould Releaser (30ml) is compact enough to use with good ventilation at a standard craft table.
Does the type of resin affect how easily it releases from silicone moulds?
Yes, noticeably. UV resin generally releases more easily from silicone than epoxy resin because it cures faster and with less exothermic heat — heat causes resin to grip mould walls more tightly. Epoxy resin, especially in deep pours, generates more heat during cure and can bond more firmly to the mould surface. Using mould release is important for both types, but it is especially critical for epoxy. For a detailed comparison relevant to small mould work, see UV Resin vs Epoxy Resin for Small Moulds: Which One Actually Works Better for Keychains, Pendants, and Jewelry in Indian Humidity?
What should I do if the resin piece is stuck and will not come out?
Do not force it. First, try flexing the mould gently in multiple directions to break the suction seal. Then try placing the mould in the freezer for 10–15 minutes — the slight contraction of the resin sometimes loosens the grip. You can also try briefly warming the exterior of the mould (not the resin surface) with a blow torch held at least 10 cm away for two to three seconds. If none of these work, the resin likely was not fully cured — let it sit another 12 hours and try again.
Wrapping Up
Silicone mould tearing in resin work is almost entirely preventable. The combination of full cure time, mould release spray applied before every pour, and a slow peel-not-pull demoulding technique will protect your moulds through far more uses than most crafters expect.
Before wedding season orders start arriving, take a little time to build these habits — check your cure times, stock up on mould release, and invest in a few soft demoulding tools. The cost of replacing torn moulds mid-season is always higher than the cost of a small bottle of release spray and a bit of patience at the demoulding stage.
Shrebhavi stocks the tools and moulds you need to work through high-volume periods without losing pieces to preventable mistakes — from the Mould Releaser (30ml) to the Jewellery & Pendant Mould (Set Of 4) designed for exactly this kind of repeated use. Take care of your moulds, and they will take care of your orders.